3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php for($b=1;$b<100;$b++) {$sum=$sum+$b;} echo $sum; ?>
Output for 5.0.4 - 7.2.6
Notice: Undefined variable: sum in /in/5LJ1g on line 5 4950
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: sum in /in/5LJ1g on line 5 4950